What is the basic distinction between an alveolar duct and an alveolar atrium?
A) Their function
B) Their epithelial type
C) The presence or absence of cilia
D) Their size
E) Their shape
E
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The __________ is the sperm-storage organ of female insects
Fill in the blank with the correct word.
Regulation of a metabolic pathway by the final product of the pathway is termed ________.
allosteric inhibition end-product inhibition negative feedback Both end-product inhibition and negative feedback are correct.
In a normal electrocardiogram, the
A. P wave occurs after the QRS complex but before the T wave. B. QRS complex results from ventricular depolarization. C. P wave results from repolarization of the atria. D. repolarization of the atria is clearly visible. E. T wave represents depolarization of the atria.
Osteoblasts involved in bone growth in length come primarily from
A. osteocytes. B. chondrocytes. C. endothelium of blood vessels. D. connective tissue surrounding blood vessels of the endosteum. E. periosteum.